P1168 – OBD-II DTC

OBD-II DTC P1168 – Fuel Select Switch Malfunction

DTC P1168 meaning

DTC P1168 refers to a “Fuel Select Switch Malfunction.” This diagnostic trouble code indicates that the vehicle’s onboard computer has detected an issue with the fuel select switch, which is responsible for determining the type of fuel being used by the engine. This switch is crucial for vehicles that can operate on multiple fuel types, such as gasoline and alternative fuels. When the system identifies a malfunction, it triggers this code to alert the driver or technician to the problem.

DTC P1168 symptoms

Common symptoms associated with DTC P1168 may include:

• Check Engine Light illuminated
• Engine performance issues, such as rough idling or stalling
• Decreased fuel efficiency
• Difficulty starting the engine
• Unusual engine noises

DTC P1168 causes

Several factors can lead to the triggering of DTC P1168, including:

• Faulty fuel select switch
• Wiring issues or poor connections in the fuel select circuit
• Malfunctioning fuel pump
• Defective fuel pressure regulator
• Software issues in the engine control module (ECM)

DTC P1168 seriousness

The seriousness of DTC P1168 can vary depending on the underlying issue. While it may not always indicate an immediate threat to vehicle safety, it can lead to:

• Reduced engine performance
• Increased emissions
• Potential damage to the engine if not addressed

It is advisable to diagnose and repair the issue promptly to avoid further complications.

How to diagnose DTC P1168

To diagnose DTC P1168, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P1168 code.
2. Inspect the fuel select switch for any visible damage or wear.
3. Check the wiring and connectors associated with the fuel select switch for corrosion or loose connections.
4. Test the fuel select switch using a multimeter to ensure it operates within specifications.
5. Examine the fuel system components, including the fuel pump and pressure regulator, for proper functionality.
6. Clear the code and perform a test drive to see if the code reappears.

How to fix DTC P1168 step-by-step instructions

To fix DTC P1168, follow these step-by-step instructions:

1. Confirm the DTC P1168 using an OBD-II scanner.
2. Inspect and replace the fuel select switch if it is found to be faulty.
3. Repair or replace any damaged wiring or connectors in the fuel select circuit.
4. Test and replace the fuel pump or pressure regulator if they are malfunctioning.
5. Update the engine control module (ECM) software if necessary.
6. Clear the DTC using the OBD-II scanner.
7. Perform a test drive to ensure the issue is resolved and the code does not return.

How to erase DTC P1168

To erase DTC P1168, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the engine to verify that the check engine light is off.

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